When I added the resistor (shown in a previous post), it fixed the Store problem but caused another. Since I connected the resistor directly to the ground of the USB to UART module, it bypassed the power switch (which connects the circuitry to the USB to UART ground). The Atmega328 did not see a high enough voltage to run (because of the resistor), but it was enough to power the other chips, causing any LEDs that were on, when the power switch was turned off, to remain lit. Chris suggested fixing this as in the partial circuit diagram he posted. (This from the full-size Kenbak-1). I changed the resistor to the 10K he recommended and connected it this way and now everything works correctly. Thanks Chris!
If I had done it this way originally I would not have needed to modify the acrylic spacer.
While taking everything apart and putting it back together several times, I managed to rip the micro USB connector from the USB to UART module :(
Two for $7.99
To avoid this problem going forward I soldered a female header to the module and then just plugged it into tall male header instead of soldering it.
Chris' software solution is the easiest fix, if you already have an Arduino Uno (which I do not)
New resistor solution:
Female header on USB to UART module